“Passion is something which very few of us have really felt. What we may have felt is enthusiasm, which is being caught up in an emotional state over something. Our passion is for something: for music, for painting, for literature, for a country, for a woman or a man; it is always the effect of a cause. When you fall in love with someone, you are in a great state of emotion, which is the effect of that particular cause; and what I am talking about is passion without a cause. It is to be passionate about everything, not just about something, whereas most of us are passionate about a particular person or thing. I think one must see this distinction very clearly. In the state of passion without a cause, there is intensity free of all attachment; but when passion has a cause, there is attachment, and attachment is the beginning of sorrow.”

Vol. XIII, p. 251
Posthumous publications, The Collected Works